the Signalling on the basis of a cheap cellular telephone

the Principle of action of a signaling device

After a breaking of contacts of the security sensor (the limit switch or the sealed-contact) the mobile phone cyclicalally dials under the last number typed on it closing of contact pair button "Call" by means of the electronic relay.

the device Schematic circuit is represented on fig. 1. The device consists of three functionally finished nodes: power conditioners with the accumulator rectifier (DA1, DA2, DA3, V�1, V�2), a logical node of control of button "Call" closing (DD1, DD2, VT4) and an activation node (DD3, DD4, VT5, VT6).

the Accumulator rectifier fulfilled on stabilizator DA1 [2] provides charging hermetic �� - the lead battery of accumulators GB1 with pressure 6 In, capacity 4 And � � (RB640E, RB640BS - the Chinese manufacture, available in wide sale).

After submission of supply voltage 12 In (such supply voltage is selected for possibility of usage of the device both in stationary, and from an automobile variant without recalculation of circuit components, in a stationary variant probably a supply of the device from a source pressure 10 � 30 In at an appropriate choice thus relay K1 and recalculation of resistors R1-R3) works relay K1 and the contacts �1.1 connects the battery to the accumulator rectifier. Through resistors R9 and R10 the charge current starts to flow. If it exceeds value 0,1 With (0,4 And for the specified battery), pressure on resistor R8 reaches Opened transistor VT2 shunts 0,6 Century resistors R6 and R7 that leads to pressure reduction by an output of the accumulator rectifier and to restriction of a charge current at demanded level. Simultaneously pressure on resistors R9 and R10 opens transistor VT1, LED HL2, testifying that the battery is charged turnes on. In process of charging pressure on the battery increases and at lowering of a charge current less than 0,02 With (80 ��) transistor VT1 is closed also the LED dies away that testifies to the charging termination. In such state the accumulator plant can be connected to the device beyond all bounds long. LED HL1 displays device connection to a network. Relay KQ.2 contacts eliminate influence of elements of the device on a mode of a charge of the accumulator plant since the general wire of nodes of the device at mains supply is thus connected to a node of restriction of a charge current of the battery (transistor VT2 and resistors R8-R12) and device nodes thus are not in a circuit of a charge of the accumulator plant. LED HL3 displays a state "Reserve power supplies". It turnes on at miss of mains voltage and connection to the accumulator plant device.

Stabilizator DA2 is necessary for coercion of input pressure (12 to level of pressure of the accumulator plant (6) and provides a supply of all device as a whole. Stabilizator DA3 DA3 feeds (3,6) mobile phone - the transmitter.

the Logical node of control provides with closing of button "Call" of phone a necessary exposure of time at an output from a location, the serial double actuating of the electronic switch leading to closing of button "Call" of phone (the first closing of the button causes number from storage of phone, the second - its call) and cyclical algorithm of a call on a case of employment of phone - the call receiver.

Works the device on a breaking of contacts. As soon as contacts SF1 (the door sensor) will be opened (it happens at door opening), the device passes in a signaling mode - starts to ring under earlier gated in number, repeating a series of calls with the period approximately 1 minute until a supply by an activation node will be ungeared. At the moment of supply submission on a node of control through relay KS.1 contacts, condenser S6 charging through resistor R17 begins closing of button "Call" of phone. On this charging leaves approximately 20 with. During this time RS the trigger on elements DD1.3, DD1.4 is forcedly retained in a zero state (on an output of element DD1.3 the low level) and does not react to level change on lower under the circuit an input of element DD1.4, so on a state of door sensor SF1. During this time it is necessary to abandon a location. Output level of the trigger is inverted by transistor VT3 and on lower under the circuit an input of element DD1.1 and on input R of counter DD2 the high level arrives. As a result counter DD2 is retained in a zero state, and the multivibrator on elements DD1.1 and DD1.2 is locked also pulses does not work out. In such state on all outputs of counter DD2 there will be a low level, ��VT4 is closed, relay K2 is de-energized also its contacts are opened. The given state of the device corresponds to a standby condition.

we Assume, at device finding in a standby condition, a door opened. Sensor SF1 contacts were opened and through resistor R16 on lower under the circuit the input of element DD1.4 arrived high level. Trigger DD1.3, DD1.4 switches in an individual state, pressure on transistor VT3 collector decreases almost to zero. The multivibrator on elements DD1.1 is thus launched, DD1.2 and on an input From counter DD2 pulses arrive. A pulse repetition cycle - 7 with. Upon termination of 1 and 3 pulses of the multivibrator on outputs 1 and 3 counters accordingly in turn there is a high level that leads to opening of transistor VT4 and actuating of relay K2, which the contacts �2.1 twice, with an interval in 14 with. Shorts contacts of button "Call" of a mobile phone. Upon termination of the fourth pulse on an input From the counter, diodes VD4, VD5 are closed that leads to transistor VT4 closing. Upon termination of the eleventh and thirteenth pulse on an input From the counter there is a repeated double closing of contacts of button "Call" of phone, �.�.�., i.e. button closings happen cyclicalally through each 10 pulses of the multivibrator.

LED HL4 displays button click phone "Call" (basically, it is necessary at a stage of adjustment of the device - in further it can be eliminated).

the Node of activation [3] is intended for control of relay K3 with the help �� sensor SF2. Relay contacts are shorted and disconnected at each closing of contacts of the sensor (at each present of a magnetic charm to sealed-contact SF2 installation site). The node controls the logical node which is carrying out closing of button "Call" of phone at an input and an output from a location, i.e. at setting on protection and removal from protection. Submission or supply voltage removal (6 on a logical node of control is thus provided with phone button "Call".

the activation Node consists of the one-shot on trigger DD3.1, trigger DD3.2, transistor VT5 and relay K3. After supply submission on the device, relay K3 it is de-energized, contacts �3.1 are opened. At closing of contacts of sealed-contact SF2, pulse of a tinkling sound of contacts launches the one-shot and works out the positive pulse by duration nearby 0,5 with. On trigger DD3.2 output thus there is a high level, transistor VT5 opens, relay K3 works also the contacts �3.1 submits a supply on a logical node. At following closing of contacts of sealed-contact SF2 the one-shot again works out single pulse by duration nearby 0,5�., which leads to that trigger DD3.2 changes the state - on a trigger output there is a low level, transistor VT5 is closed, relay K3 is de-energized also contacts �3.1 break off a circuit of submission of a supply on a logical node of control of phone button "Call". Thus, each closing of contacts of sealed-contact SF2 changes relay K3 state, contacts �3.1 which in turn submit or disconnect a supply on a logical node.

the discontinuous signal Generator on chip DD4 serves for the sound half-second notification about modes activation - deactivation, i.e. each time, it is short-term bringing a charm to sealed-contact SF2 installation site, the discontinuous sound signal is distributed. The generator consists of two interconnected multivibrators one of which - on elements DD4.3 and DD4.4, forms on an output of a pack of pulses with repetition frequency about 2 Hz, and the second - on elements DD4.1 and DD4.2 pulses of filling by frequency nearby 1 ��. The generator is launched by submission on lower under the circuit an input of element DD4.3 of control voltage of high level from an one-shot output on trigger DD3.1. The glow of LED HL5 signals in addition about activation.

the General algorithm of system operation the following:

1. Quitting a location, we bring short-term magnetic charm to sealed-contact SF2 installation site. The half-second sound signal and a glow of LED HL5 testify to system setting on protection;

2. To quit a location it is necessary approximately during 20 with., during this time the system will not react to opening - door closing;

3. At unapproved opening of a door in a location, approximately through 25 with. (This time depends as on pulse frequency of the multivibrator on elements DD1.1 and DD1.2, and dialup on the phone number, typed last on a mobile phone - the transmitter happens in the speed of dialup, defined network GSM);

4. The continuous dialup to the subscriber happens approximately during 45 � 50 with., phone - the receiver, then through 50 � 60 at this time rings with. Pauses happens repeated �� dialup �.�.�. Cyclicalally;

5. After notification obtaining about breaking by phone - the receiver, pushing it button "Call", probably to carry out listening of protected object during 45 � 50 with.;

6. For system deblocking it is necessary after opening of a door during approximately 20 with (this time depends on pulse frequency of the multivibrator on elements DD1.1 and DD1.2) short-term to bring a magnetic charm to sealed-contact SF2. The short sound signal Thus sounds and LED HL5 dies away.

In the device relay RES22, the passport of the Russian Federation 4.500.129 (�1) are applied; �� 49, passport �� 4.569.026 or �� 4.569.032 (�2, �3). It is possible to apply and other relays with appropriate number of contact units. �1 - on pressure of actuating 12 In; �2, �3 - on pressure of actuating 4 � 6 V.Diody VD1, VD2 are replaceable any, withstanding a current, twice more charge (400 ��).

the transistors Specified on the circuit is admissible to replace with any of series �� 315 (VT1, VT3, VT6), �� 3102 (VT2), �� 815 (VT4, VT5).

Receiver inset BF1 is used from the phone used in the device. It is necessary for dismantling accurately from phone casing. Stabilizators DA1, DA2, DA3 are allocated on three needle-shaped heat dissipating devices in the sizes 45 � 20 mm.

All details, except for the door sensor, the sealed-contact of a node of activation, the receiver inset and LEDs, are mounted on the printed circuit board from one-sided �� glass fibre laminate in the thickness of 1,5 mm in the sizes of 125 mm � 60 mm.

Phone connect to the printed circuit board two steams of wires. One pair solder immediately to the printing explorers going to contacts of button "Call", the second - to printing explorers of a supply of phone. Besides, from phone the microphone which is used for location listening is carried out outside by a shielded lead.